Enriched rearing improved survival

The migration and survival of radio tagged salmon smolts was monitored with automatic listening stations and by manual tracking using a boat along a 290 km migration route in River Tornionjoki. Enriched rearing improved the survival of hatchery fish compared to fish reared in normal tanks but wild smolts still had the highest survival rates.
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Regulated Rivers Research

Finland has about 159 000 kilometers of rivers, of which more than 90 % are regulated or otherwise modified. Thus, changes of these river systems must be taken into account in the management of riverine fish populations.
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Finnish adfluvial brown trout stocks are endangered. One of the most viable populations lives in the Oulankajoki river system, Northern Finland - a joint water course between Finland and Russia. The ongoing research project is attempting to develop joint management and conservation actions between Finland and Russia to assure the wellbeing of these unique brown trout stocks.
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Research activities

The project
aims to ensure the sustainable use of adfluvial brown trout populations in
transborder waters through cross-border cooperation between Finland and Russia.
This is achieved by establishing a model for the joint management of the
Oulanka River system through a series of activities, which include 1)surveying
the current state of the trout resource, 2)developing practices for the
sustainable management of the resource, 3)establishing a joint integrated
management group for monitoring the management, and 4)raising awareness of the
value and unique nature of the trout. ln short, the project develops means for
cross border cooperation in Finland and Russia in order to ensure the
sustainable recreational use of brown trout (Salmo trutta) populations. In
addition, the model for cross-border management developed during the project
will work as a pilot study for other transborder water areas where sustainable
management of shared natural resources is needed.